A coin cell battery holder is a component used to easily hold and connect coin cell batteries. These battery holders are electrical devices that allow a connection between the battery and the electronic circuit in which they are installed. They are typically made of metallic materials such as brass, stainless steel, and aluminum, and are designed to hold and transmit a specified voltage and current rating, depending on the application. By providing a secure connection between the battery and the circuit, these holders ensure safety and reliable operation of the circuit. The holders are typically designed for easy installation and removal of the battery and are usually labeled or marked for easy identification.